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You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. The application consumes a Microsoft Windows Communication Foundation (WCF) service. The WCF service exposes the following method. 
[WebInvoke] 
string UpdateCustomerDetails(string custID); 
The application hosts the WCF service by using the following code segment. WebServiceHost host = new WebServiceHost(typeof(CService), 
new Uri("http://win/")); 
ServiceEndpoint ep = host.AddServiceEndpoint(typeof(ICService), 
new WebHttpBinding(), ""); 
You need to invoke the UpdateCustomerDetails method. 
Which code segment should you use?（）

You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. 
| English | Chinese | Japan | Korean | - 48 - Test Information Co., Ltd. All rights reserved. You create a Web form that contains the following code fragment.

You write the following code segment in the code-behind file. (Line numbers are included for reference only.) 
01 protected void Page_Load(object sender, EventArgs e) 
02 { 
03 DataSet objDS = new DataSet(); 
04 SqlDataAdapter objDA = new SqlDataAdapter(objCmd); 
05 objDA.Fill(objDS); 
06 gridCities.DataSource = objDs; 07 gridCities.DataBind(); 
08 Session["ds"] = objDS; 
09 } 
10 protected void btnSearch_Click(object sender, EventArgs e) 
11 { 
12 
13 }
You need to ensure that when the btnSearch Button control is clicked, the records in the gridCities GridView control are filtered by using the value of the txtSearch TextBox. Which code segment you should insert at line 12?（）